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Tweaking An Icon: Upgrading Our Jeep Wrangler Unlimited

Outfitting the Wrangler Unlimited for Towing and Off-Road Travel

By Mark Quasius, Photography by Mark Quasius

Rvmagonline, July 01, 2012

Jeep’s Wrangler has been around seemingly forever. While its trademark seven-slot grille remains basically the same, today’s Wrangler has seen a ton of improvements since the 1941 Jeep that carried our armed forces to victory in World War II.

One new addition was the Wrangler Unlimited, which offered a longer wheelbase and four doors. The Wrangler Unlimited quickly became a hot seller with those buyers who wanted a Jeep but needed more practicality for everyday use.

RV owners with motorhomes quickly appreciated this, and the Wrangler Unlimited is now a common sight at many campgrounds. The Wrangler is easy to tow behind a motorhome and is the perfect vehicle to take into town for supplies or go exploring off-road at the nearby scenic areas typically near RV parks and campgrounds.

Wranglers are ideal for towing behind an RV and don’t require any driveline disconnects or transmission lube pumps. Just connect the Jeep to the RV, slip the transfer case into neutral, and go.

Wranglers are ideal for towing behind an RV and don’t require any driveline disconnects or

Off-Road Considerations

Normal tow bar base plates mount to the Jeep’s frame and extend below the front bumper. This puts them in harm’s way should you get them hung up on a rock or bottom out if driving in deep ruts. Bending up a base plate means you won’t be able to tow your Jeep home, so that limits what you can do with your Jeep in the dirt.

The best choice is to find a bumper strong enough to handle a set of tow bar mounting brackets, so that you can connect your bar directly to them. That way the area beneath your front bumper is clear and you’ll maintain better approach angles and prevent damage to your towing setup. Plus, by not requiring a base plate you can save that money and apply it towards a good front bumper design.

01. The original rear bumper was molded with a recess to drop the spare tire into.

01. The original rear bumper was molded with a recess to drop the spare tire into.

The Plan

After doing lots of research I decided to use Rock Hard 4x4 products due to their great looking design and a commitment to quality and strength. The company also had custom tow bar brackets available for its front bumpers that fit either Blue Ox or Roadmaster tow bars.

To handle protection against damage from rocks and other objects when off-roading, I ordered up a complete set of skidplates from Rock Hard, as well as a set of Mopar Rock Rails from my local Jeep dealer. To connect the Jeep’s rear lights to the motorhome I installed a Tow Daddy Plug-N-Tow module. The Tow Daddy module is the simplest and safest way to tie your existing lights into the RV’s lighting feeds when towing.

Finally, an M&G auxiliary braking system was selected. It utilizes the motorhome’s air brakes to proportionately operate the towed vehicle’s brakes. The module is fully contained under the Jeep’s hood and does not tap into the Jeep’s electrical or hydraulic braking systems. It’s failsafe and foolproof.

02. I used a floor jack to lift the substantial Rock Hard 4x4 bumper into place. The bumper included a hitch receiver and was fitted with D-ring clevises for retrieval operations.

02. I used a floor jack to lift the substantial Rock Hard 4x4 bumper into place. The bum

Installing the Bumpers

The rear bumper was pretty straight forward. Unbolt the old one and replace it with the new one. Be sure to get an extra hand or at-least a floor jack to help as these bumpers are heavy.

The front bumper was the heart of the upgrade. Once the original plastic bumper and fog lights were removed and a few small modifications to the frame were completed, the new Rock Hard bumper was installed. Then it was time to move on to the winch.

The bumper has a large opening for the winch to set into. It will accommodate the huge Warn Powerplant winch we chose, but it fills the entire area and requires a few small modifications to fit properly. Once the winch was in and safely bolted up, the tow bar brackets were next.

03. A spare tire adaptor plate was included to raise the spare tire enough to clear the Rock Hard rear bumper.

03. A spare tire adaptor plate was included to raise the spare tire enough to clear the

The factory bumper and the Rock Hard bumper mount with eight bolts. Utilizing four of these bolts to mount the tow bar brackets is the strongest (and easiest) way to get the job done. So that’s what I did.

Next a few holes were drilled to install the socket for the tow lighting umbilical cable as well as a connection for the M&G auxiliary brake air line from the motorhome. A breakaway switch was then installed to activate the brakes should it ever become disconnected from the motorhome when towing. Finally the D-ring shackles were hung on the front and a snap on license plate bracket was mounted on the winch roller fairlead to make it legal.

04. The Wrangler’s muffler is transversely mounted behind the rear bumper. A Rock Hard muffler skid plate was added to protect this area when exiting downgrades or climbing over rocks.

05. A set of Mopar Rock Rub Rails was ordered from the local Jeep dealer to protect the rocker panels from damage.

05. A set of Mopar Rock Rub Rails was ordered from the local Jeep dealer to protect the

06. The original Jeep fog lights were mounted in center of the front bumper and held in place with four hex head screws.

06. The original Jeep fog lights were mounted in center of the front bumper and held in p

07. The Rock Hard front bumper is designed to accept the original Jeep fog lights and has pre-tapped holes to accept the mounting screws.

07. The Rock Hard front bumper is designed to accept the original Jeep fog lights and ha

08. The Rubicon has an electric front sway-bar disconnect mechanism to aide articulation in off-road situations. This unit normally is located just beneath and behind the front bumper in a vulnerable location. The Rock Hard front bumper is formed to fully protect the mechanism.

08. The Rubicon has an electric front sway-bar disconnect mechanism to aide articulation

09. A vacuum booster pump is part of the new 2012 Wrangler powertrain. It is located near the end of the driver’s side front frame rail and will interfere with most aftermarket front bumpers. Rock Hard supplied a custom bracket to relocate the pump so that it was out of the way.

09. A vacuum booster pump is part of the new 2012 Wrangler powertrain. It is located nea